2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013-2018 Mellanox Technologies, Ltd.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 #include <sys/cdefs.h>
35 #include <sys/param.h>
36 #include <sys/systm.h>
38 #include <sys/vnode.h>
40 #include <sys/filedesc.h>
41 #include <linux/types.h>
42 #include <linux/wait.h>
43 #include <linux/semaphore.h>
44 #include <linux/spinlock.h>
45 #include <linux/dcache.h>
53 struct pipe_inode_info;
54 struct vm_area_struct;
55 struct poll_table_struct;
62 #define i_private v_data
64 #define S_IRUGO (S_IRUSR | S_IRGRP | S_IROTH)
65 #define S_IWUGO (S_IWUSR | S_IWGRP | S_IWOTH)
67 typedef struct files_struct *fl_owner_t;
69 struct file_operations;
71 struct linux_file_wait_queue {
73 struct wait_queue_head *wqh;
75 #define LINUX_FWQ_STATE_INIT 0
76 #define LINUX_FWQ_STATE_NOT_READY 1
77 #define LINUX_FWQ_STATE_QUEUED 2
78 #define LINUX_FWQ_STATE_READY 3
79 #define LINUX_FWQ_STATE_MAX 4
84 const struct file_operations *f_op;
87 int f_mode; /* Just starting mode. */
88 struct dentry *f_dentry;
89 struct dentry f_dentry_store;
90 struct selinfo f_selinfo;
91 struct sigio *f_sigio;
92 struct vnode *f_vnode;
93 #define f_inode f_vnode
94 volatile u_int f_count;
96 /* anonymous shmem object */
99 /* kqfilter support */
101 #define LINUX_KQ_FLAG_HAS_READ (1 << 0)
102 #define LINUX_KQ_FLAG_HAS_WRITE (1 << 1)
103 #define LINUX_KQ_FLAG_NEED_READ (1 << 2)
104 #define LINUX_KQ_FLAG_NEED_WRITE (1 << 3)
105 /* protects f_selinfo.si_note */
107 struct linux_file_wait_queue f_wait_queue;
109 /* pointer to associated character device, if any */
110 struct linux_cdev *f_cdev;
113 #define file linux_file
114 #define fasync_struct sigio *
116 #define fasync_helper(fd, filp, on, queue) \
119 *(queue) = &(filp)->f_sigio; \
125 #define kill_fasync(queue, sig, pollstat) \
127 if (*(queue) != NULL) \
128 pgsigio(*(queue), (sig), 0); \
131 typedef int (*filldir_t)(void *, const char *, int, off_t, u64, unsigned);
133 struct file_operations {
134 struct module *owner;
135 ssize_t (*read)(struct linux_file *, char __user *, size_t, off_t *);
136 ssize_t (*write)(struct linux_file *, const char __user *, size_t, off_t *);
137 unsigned int (*poll) (struct linux_file *, struct poll_table_struct *);
138 long (*unlocked_ioctl)(struct linux_file *, unsigned int, unsigned long);
139 long (*compat_ioctl)(struct linux_file *, unsigned int, unsigned long);
140 int (*mmap)(struct linux_file *, struct vm_area_struct *);
141 int (*open)(struct inode *, struct file *);
142 int (*release)(struct inode *, struct linux_file *);
143 int (*fasync)(int, struct linux_file *, int);
145 /* Although not supported in FreeBSD, to align with Linux code
146 * we are adding llseek() only when it is mapped to no_llseek which returns
147 * an illegal seek error
149 off_t (*llseek)(struct linux_file *, off_t, int);
151 /* We do not support these methods. Don't permit them to compile. */
152 loff_t (*llseek)(struct file *, loff_t, int);
153 ssize_t (*aio_read)(struct kiocb *, const struct iovec *,
154 unsigned long, loff_t);
155 ssize_t (*aio_write)(struct kiocb *, const struct iovec *,
156 unsigned long, loff_t);
157 int (*readdir)(struct file *, void *, filldir_t);
158 int (*ioctl)(struct inode *, struct file *, unsigned int,
160 int (*flush)(struct file *, fl_owner_t id);
161 int (*fsync)(struct file *, struct dentry *, int datasync);
162 int (*aio_fsync)(struct kiocb *, int datasync);
163 int (*lock)(struct file *, int, struct file_lock *);
164 ssize_t (*sendpage)(struct file *, struct page *, int, size_t,
166 unsigned long (*get_unmapped_area)(struct file *, unsigned long,
167 unsigned long, unsigned long, unsigned long);
168 int (*check_flags)(int);
169 int (*flock)(struct file *, int, struct file_lock *);
170 ssize_t (*splice_write)(struct pipe_inode_info *, struct file *,
171 loff_t *, size_t, unsigned int);
172 ssize_t (*splice_read)(struct file *, loff_t *,
173 struct pipe_inode_info *, size_t, unsigned int);
174 int (*setlease)(struct file *, long, struct file_lock **);
177 #define fops_get(fops) (fops)
178 #define replace_fops(f, fops) ((f)->f_op = (fops))
180 #define FMODE_READ FREAD
181 #define FMODE_WRITE FWRITE
182 #define FMODE_EXEC FEXEC
183 #define FMODE_UNSIGNED_OFFSET 0x2000
184 int __register_chrdev(unsigned int major, unsigned int baseminor,
185 unsigned int count, const char *name,
186 const struct file_operations *fops);
187 int __register_chrdev_p(unsigned int major, unsigned int baseminor,
188 unsigned int count, const char *name,
189 const struct file_operations *fops, uid_t uid,
190 gid_t gid, int mode);
191 void __unregister_chrdev(unsigned int major, unsigned int baseminor,
192 unsigned int count, const char *name);
195 unregister_chrdev(unsigned int major, const char *name)
198 __unregister_chrdev(major, 0, 256, name);
202 register_chrdev(unsigned int major, const char *name,
203 const struct file_operations *fops)
206 return (__register_chrdev(major, 0, 256, name, fops));
210 register_chrdev_p(unsigned int major, const char *name,
211 const struct file_operations *fops, uid_t uid, gid_t gid, int mode)
214 return (__register_chrdev_p(major, 0, 256, name, fops, uid, gid, mode));
218 register_chrdev_region(dev_t dev, unsigned range, const char *name)
225 unregister_chrdev_region(dev_t dev, unsigned range)
232 alloc_chrdev_region(dev_t *dev, unsigned baseminor, unsigned count,
239 /* No current support for seek op in FreeBSD */
241 nonseekable_open(struct inode *inode, struct file *filp)
246 extern unsigned int linux_iminor(struct inode *);
247 #define iminor(...) linux_iminor(__VA_ARGS__)
249 static inline struct linux_file *
250 get_file(struct linux_file *f)
253 refcount_acquire(f->_file == NULL ? &f->f_count : &f->_file->f_count);
257 static inline struct inode *
258 igrab(struct inode *inode)
262 error = vget(inode, 0);
270 iput(struct inode *inode)
277 no_llseek(struct file *file, loff_t offset, int whence)
284 noop_llseek(struct linux_file *file, loff_t offset, int whence)
287 return (file->_file->f_offset);
290 static inline struct vnode *
291 file_inode(const struct linux_file *file)
294 return (file->f_vnode);
298 call_mmap(struct linux_file *file, struct vm_area_struct *vma)
301 return (file->f_op->mmap(file, vma));
304 #endif /* _LINUX_FS_H_ */